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authorAl Viro <viro@parcelfarce.linux.theplanet.co.uk>2005-09-03 15:57:27 -0700
committerLinus Torvalds <torvalds@evo.osdl.org>2005-09-05 00:06:21 -0700
commite54a5dfb960053437f464a7ce372a8acc293fdcb (patch)
tree01432a58e039716ab0a02347a027e84da10c370f /arch/um/sys-x86_64/signal.c
parent3b52166cf72f0826c6d8fa0541c7d4ae39c5a146 (diff)
downloadlinux-stericsson-e54a5dfb960053437f464a7ce372a8acc293fdcb.tar.gz
[PATCH] uml: fix signal frame copy_user
The copy_user stuff in the signal frame code was broke. Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um/sys-x86_64/signal.c')
-rw-r--r--arch/um/sys-x86_64/signal.c41
1 files changed, 24 insertions, 17 deletions
diff --git a/arch/um/sys-x86_64/signal.c b/arch/um/sys-x86_64/signal.c
index 8fdaed06c10d..fe1d065332b1 100644
--- a/arch/um/sys-x86_64/signal.c
+++ b/arch/um/sys-x86_64/signal.c
@@ -104,28 +104,35 @@ int copy_sc_to_user_skas(struct sigcontext *to, struct _fpstate *to_fp,
int copy_sc_from_user_tt(struct sigcontext *to, struct sigcontext *from,
int fpsize)
{
- struct _fpstate *to_fp, *from_fp;
- unsigned long sigs;
- int err;
-
- to_fp = to->fpstate;
- from_fp = from->fpstate;
- sigs = to->oldmask;
- err = copy_from_user(to, from, sizeof(*to));
- to->oldmask = sigs;
- return(err);
+ struct _fpstate *to_fp, *from_fp;
+ unsigned long sigs;
+ int err;
+
+ to_fp = to->fpstate;
+ sigs = to->oldmask;
+ err = copy_from_user(to, from, sizeof(*to));
+ from_fp = to->fpstate;
+ to->fpstate = to_fp;
+ to->oldmask = sigs;
+ if(to_fp != NULL)
+ err |= copy_from_user(to_fp, from_fp, fpsize);
+ return(err);
}
int copy_sc_to_user_tt(struct sigcontext *to, struct _fpstate *fp,
struct sigcontext *from, int fpsize)
{
- struct _fpstate *to_fp, *from_fp;
- int err;
-
- to_fp = (fp ? fp : (struct _fpstate *) (to + 1));
- from_fp = from->fpstate;
- err = copy_to_user(to, from, sizeof(*to));
- return(err);
+ struct _fpstate *to_fp, *from_fp;
+ int err;
+
+ to_fp = (fp ? fp : (struct _fpstate *) (to + 1));
+ from_fp = from->fpstate;
+ err = copy_to_user(to, from, sizeof(*to));
+ if(from_fp != NULL){
+ err |= copy_to_user(&to->fpstate, &to_fp, sizeof(to->fpstate));
+ err |= copy_to_user(to_fp, from_fp, fpsize);
+ }
+ return(err);
}
#endif